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∠CAB + 125° = 180°
∠CAB = 180° - 125° = 55°
Sekarang perhatikan segitiga ABC, jumlah sudut-sudutnya 180°°
76° + 55° + ∠BAC = 180°
∠BAC + 131° = 180°
∠BAC = 180° - 131° = 49°
maka caranya:
180=125+76+∠BAC
180-125-76=∠BAC
∠BAC=-21
mungkin jawaban ini aneh tapi tolong beri satuan pada soal, aku akan berusaha jawab. moga membantu.